Additive engineering for highly efficient and stable perovskite solar cells

Applied Physics Reviews, Journal Year: 2023, Volume and Issue: 10(1)

Published: Feb. 14, 2023

Since the groundbreaking report on solid-state perovskite solar cells (PSCs) in 2012, PSC receives great attention due to its high power conversion efficiency (PCE) obtainable at low-cost fabrication. A PCE of 9.7% 2012 was swiftly improved 25.7% 2022 via composition engineering and grain size control. The excellent photovoltaic performance originates from defect-tolerant property organic lead halide associated with antibonding nature valence band. Nevertheless, reduction defect-induced trap density state is still required improve further stability. Among methods reported reduce defects, additive one promising strategies for controlling crystallographic defects because it can regulate crystallization kinetics boundaries. In this review, we describe materials applied lead-based perovskite. addition, effects stability are discussed.

Language: Английский

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Inorganic Perovskite Surface Reconfiguration for Stable Inverted Solar Cells with 20.38% Efficiency and Its Application in Tandem Devices

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(28)

Published: April 13, 2023

Inorganic perovskite solar cells (IPSCs) have garnered attention in tandem (TSCs) due to their suitable bandgap and impressive thermal stability. However, the efficiency of inverted IPSCs has been limited by high trap density on top surface inorganic film. Herein, a method for fabricating efficient reconfiguring properties CsPbI2.85 Br0.15 film with 2-amino-5-bromobenzamide (ABA) is developed. This modification not only exhibits synergistic coordination carbonyl (C=O) amino (NH2 ) groups uncoordinated Pb2+ , but also Br fills halide vacancies suppresses formation Pb0 effectively passivating defective surface. As result, champion 20.38%, highest reported date achieved. Furthermore, successful fabrication p-i-n type monolithic perovskite/silicon TSCs an 25.31% first time demonstrated. Crucially, unencapsulated ABA-treated shows enhanced photostability, retaining 80.33% its initial after 270 h, stability (maintain 85.98% 300 h at 65 °C). The retains 92.59% 200 under continuous illumination ambient air.

Language: Английский

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Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure Green LEDs

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(3), P. 1133 - 1140

Published: Feb. 23, 2024

Perovskite light-emitting diodes (PeLEDs) have recently achieved a great breakthrough in external quantum efficiency (EQE). However, the operational stability of pure primary color PeLEDs lags far behind because serious ion migration. Herein, self-stabilized quasi-2D perovskite is constructed with strategically synthesized ion-migration-inhibition ligand (IMIligand) to realize highly stable and efficient green approaching standard light Rec. 2020. The IMIligand takes role not only eliminate migration pathways anchor halide ions suppress but also further enhance crystalline orientation energy transfer perovskites. Meanwhile, overcomes degradation electrical performance caused by conventional exogenous passivation additives. Ultimately, figure merit at least double that previous works. devices achieve an EQE 26.2% 920 min initial luminance 1000 cd m–2.

Language: Английский

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Ion Migration in Lead-Halide Perovskites: Cation Matters

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(4), P. 1006 - 1018

Published: Jan. 22, 2024

Metal halide perovskites exhibit remarkable properties for optoelectronic applications, yet their susceptibility to ion migration poses challenges device stability. Previous research has predominantly focused on the of ions. However, cations, which also a significant influence performance, is largely overlooked. In this Perspective, we review cations and impacts perovskite materials devices. Special attention shall be devoted recent insights into L-site organic in 2D/3D perovskites. We outline inspirations directions further cation perovskites, highlighting new possibilities advancing optoelectronics.

Language: Английский

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Ultralow voltage–driven efficient and stable perovskite light-emitting diodes

Science Advances, Journal Year: 2024, Volume and Issue: 10(36)

Published: Sept. 6, 2024

The poor operational stability of perovskite light-emitting diodes (PeLEDs) remains a major obstacle to their commercial application. Achieving high brightness and quantum efficiency at low driving voltages, thus effectively reducing heat accumulation, is key enhancing the lifetime PeLEDs. Here, we present breakthrough, attaining record-low voltage while maintaining efficiency. By thoroughly suppressing interface recombination ensuring excellent charge transport, our PeLEDs, with an emission peak 515 nanometers, achieve maximum 90,295 candelas per square meter external 27.8% ultralow turn-on 1.7 volts (~70% bandgap voltage). Notably, Joule nearly negligible these substantially extending 7691.1 hours. Our optimized strategies tackle issue through thermal management, paving way for highly stable

Language: Английский

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Synchronously Polishing the Lead-Rich Surface and Passivating Surface Defects of CsPb(Br/I)₃ Quantum Dots for High-Performance Pure-Red PeLEDs

Nano Letters, Journal Year: 2024, Volume and Issue: 24(12), P. 3719 - 3726

Published: March 14, 2024

Mixed-halide CsPb(Br/I)3 perovskite quantum dots (QDs) are regarded as one of the most promising candidates for pure-red light-emitting diodes (PeLEDs) due to their precise spectral tuning property. However, lead-rich surface these QDs usually results in halide ion migration and nonradiative recombination loss, which remains a great challenge high-performance PeLEDs. To solve above issues, we employ chelating agent 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid hydrate (DOTA) polish meanwhile introduce new ligand 2,3-dimercaptosuccinic (DMSA) passivate defects QDs. This synchronous post-treatment strategy high-quality with suppressed an improved photoluminescence yield, enables us fabricate spectrally stable PeLEDs peak external efficiency 23.2%, representing best performance based on mixed-halide reported date.

Language: Английский

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Synergistic Integration of Halide Perovskite and Rare‐Earth Ions toward Photonics

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Halide perovskites (HPs), emerging as a noteworthy class of semiconductors, hold great promise for an array optoelectronic applications, including anti‐counterfeiting, light‐emitting diodes (LEDs), solar cells (SCs), and photodetectors, primarily due to their large absorption cross section, high fluorescence efficiency, tunable emission spectrum within the visible region, tolerance lattice defects, well adaptability solution‐based fabrication processes. Unlike luminescent HPs with band‐edge emission, trivalent rare‐earth (RE) ions typically emit low‐energy light through intra‐4f optical transitions, characterized by narrow spectra long lifetimes. When fused, cooperative interactions between REs endow resulting binary composites not only properties inherited from parent materials but also introduce new attributes unattainable either component alone. This review begins fundamental characteristics REs, followed particular focus on impact electronic structures associated energy transfer The advanced synthesis methods utilized prepare HPs, RE‐doped compounds, are overviewed. Furthermore, potential applications summarized across diverse domains, high‐fidelity anticounterfeiting, bioimaging, LEDs, photovoltaics, photodetection, photocatalysis, conclude remaining challenges future research prospects.

Language: Английский

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Stabilized Low-Dimensional Species for Deep-Blue Perovskite Light-Emitting Diodes with EQE Approaching 3.4%

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(40), P. 18470 - 18478

Published: Sept. 27, 2022

Despite recent encouraging developments, achieving efficient blue perovskite light-emitting diodes (PeLEDs) have been widely considered a critical challenge. The efficiency breakthrough only occurred in the sky-blue region, and device performance of pure-blue deep-blue PeLEDs lags far behind those their counterparts. To avoid negative effects associated with dimensionality reduction excess chloride typically needed to achieve emission, here we demonstrate guanidine (GA+)-induced (∼457 nm) emitters enabling spectrally stable record external quantum (EQE) over 3.41% through combination quasi-2D perovskites halide engineering. Owing presence GA+, even small inclusion ions is sufficient for generating electroluminescence (EL), clear contrast previously reported significant that negatively affects spectral stability. Based on carrier dynamics analysis theoretical calculation, GA+ found stabilize low-dimensional species during annealing, retarding cascade energy transfer facilitating EL. Our findings open potential third route beyond conventional methods excessive incorporation.

Language: Английский

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A Spacer Cation Assisted Nucleation and Growth Strategy Enables Efficient and High‐Luminance Quasi‐2D Perovskite LEDs

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(2)

Published: Nov. 4, 2022

Abstract Quasi‐2D Ruddlesden‐Popper perovskites receive tremendous attention for application in light‐emitting diodes (LEDs). However, the role of organic ammonium spacers on perovskite film has not been fully‐understood. Herein, a spacer cation assisted nucleation and growth strategy, where guanidinium (GA + ) is introduced into precursor at interface between hole transport layer (HTL) perovskite, to achieve dense uniform films with enhanced optical electrical performance developed. A thin GABr pre‐formed HTL provides more sites crystal; while added GA reduces crystallization rate due strong hydrogen bonding interacts intermediates, which promotes enhanced‐quality quasi‐2D films. The ionized group (NH 3 also favors formation polydisperse domain distribution, amine or imine 2 NH) interact defects through coordination bonding. strategy advantageous producing efficient high‐luminance LEDs, peak external quantum efficiency over 20% luminance up 100 000 cd m −2 . This work can inform underpin future development high‐performance LEDs concurrent high brightness.

Language: Английский

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Mitigating halide ion migration by resurfacing lead halide perovskite nanocrystals for stable light-emitting diodes

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(16), P. 5516 - 5540

Published: Jan. 1, 2023

Lead halide perovskite nanocrystals are promising for next-generation high-definition displays, especially in light of their tunable bandgaps, high color purities, and carrier mobility. Within the past few years, external quantum efficiency nanocrystal-based light-emitting diodes has progressed rapidly, reaching standard commercial applications. However, low operational stability these remains a crucial issue industrial development. Recent experimental evidence indicates that migration ionic species is primary factor giving rise to performance degradation diodes, ion closely related defects on surface at grain boundaries thin films. In this review, we focus central idea reconstruction nanocrystals, discuss influence migration, summarize recent advances resurfacing nanocrystal strategies toward mitigating improve as-fabricated diode devices. From perspective resurfacing, set out research direction improving both spectral diodes.

Language: Английский

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